The market for vegan supplements has grown enormously in recent years. And with it, so has the number of products that promise a lot on the front label and disappoint on the back. Knowing how to read a nutritional label is not an optional skill: it is the difference between buying a supplement that works and paying for marketing in powder form.
This guide explains to you, point by point, what to check before buying any vegan protein or plant-based supplement, without unnecessary jargon and with concrete criteria.
1. The protein source matters more than the percentage
The first detail almost everyone looks at is the percentage of protein per serving. Mistake. What matters is not just how much protein is there, but where it comes from and which amino acids it provides.
Plant-based proteins have incomplete amino acid profiles when they come from a single source. Pea protein, for example, is rich in lysine but low in methionine and cystine. Rice protein has the opposite problem. None by itself offers a complete profile of essential amino acids, including BCAAs (leucine, isoleucine, and valine), which are key to muscle synthesis.
What to look for on the label: a blend of at least 2-3 complementary plant sources. The most common and proven are pea, rice, pumpkin, and sunflower. A formula that combines these four sources achieves an amino acid profile comparable to whey protein, without resorting to animal-derived ingredients.
Red flag: products that use a single source (only pea or only rice) and do not specify the amino acid profile in the technical specifications.
2. Functional ingredients: the difference between a basic supplement and a premium one
This is where generic products are separated from well-thought-out formulas. Beyond the base protein, some supplements incorporate functional ingredients with real scientific backing. Learn to recognize them.
DigeZyme® - Multi-enzyme complex
One of the most frequent problems with plant-based protein is heavy digestion: bloating, gas, feelings of discomfort. It is not a myth. Plant-based proteins, especially pea protein, contain antinutrients that can hinder their absorption.
DigeZyme® is a plant-based enzyme complex that includes five digestive enzymes: amylase (carbs), protease (proteins), lactase (lactose), lipase (fats), and cellulase (plant fiber). Its function is to facilitate the digestion of macronutrients and improve nutrient absorption. A supplement that includes it in its formula is responding to a real problem, not adding a cosmetic ingredient.
Nutriose® - High-quality soluble fiber
Most people in Spain do not reach the 25g of daily fiber recommended by the EFSA. A protein supplement that incorporates Nutriose®—a soluble fiber with excellent solubility and a neutral taste—allows you to add fiber without altering the flavor or texture of the shake. 8g of fiber per serving is equivalent to approximately a third of the recommended daily intake. It is a real contribution, not a symbolic one.
Creatine monohydrate - The only ergogenic aid with EFSA backing
If your goal includes physical performance, creatine monohydrate is the supplement with the most scientific evidence available. The EFSA recognizes that creatine increases physical performance in successive bursts of short-term, high-intensity exercise with a daily intake of 3g. This is not a marketing claim: it is a statement approved by the European regulatory authority.
A supplement that integrates 3g of creatine monohydrate per serving eliminates the need to take creatine separately, simplifying supplementation without sacrificing efficacy.
3. What it should not have: sugars, artificial sweeteners, and additives
The back label is where many products show their shortcomings. These are the ingredients that are best avoided or, at least, questioned:
Added sugars — Sucrose, dextrose, glucose syrup, or any variant add empty calories and cause insulin spikes. A good vegan supplement does not need them.
Artificial sweeteners — Aspartame (E951), sucralose (E955), and acesulfame K (E950) are the most frequent. Although their moderate consumption is approved, excessive use can alter the gut microbiota and generate dependence on the intense sweet taste. Opt for natural sweeteners like stevia extract or erythritol if the product needs to be sweetened.
Carrageenan: A common thickener in vegan products that, in some studies, has been associated with intestinal inflammation. It is not strictly necessary in a well-designed formula.
Artificial colorings: They provide no nutritional value and are a clear indicator that the manufacturer prioritizes visual appearance over the quality of the formulation.
Rule of thumb: if the list of ingredients has more than 10 components and you don't recognize at least half, look for another option.
4. Certifications that truly matter
A product can put "vegan" on the label without anyone having verified it. Third-party certifications are the only real guarantee. These are the ones that carry weight:
Certified Vegan (Vegan Action): Independent verification that the product contains no animal-derived ingredients and has not been tested on animals. It is the international standard reference.
Certified Gluten-Free: Relevant not only for people with celiac disease or gluten sensitivity, but also as an indicator of quality control in the manufacturing process. Cross-contamination in factories is a real risk in vegan products that share production lines with other ingredients.
Organic ingredients: It is not essential, but it is a sign that the manufacturer has criteria in the selection of raw materials. Organic plant-based proteins are free of synthetic pesticides and herbicides.
Red flag: claims like "natural," "clean," or "preservative-free" without any certification to support them. These are terms with no legal definition or mandatory verification.
5. How to correctly interpret the nutritional table
The nutritional table has two columns: per 100g and per serving. This is where many brands play with the numbers.
Protein per serving, not per 100g: A product might have 60g of protein per 100g, but if the recommended serving is 20g, you are taking 12g of protein. Always calculate based on the actual dose you are going to consume.
Carbohydrate/protein ratio: In a good vegan protein supplement, the carbohydrates per serving should be notably lower than the protein. If carbohydrates exceed 20% of the serving weight, the product is closer to an energy supplement than a real protein supplement.
Fiber as an indicator of quality: Fiber is not a secondary detail. A supplement that provides real fiber (not just as a filler) indicates that the formula is designed to contribute to complete nutrition, not just the occasional protein intake.
Fat: type and amount: The fats in a plant-based supplement mainly come from seeds (sunflower, pumpkin). These are healthy unsaturated fats. Be wary of products with high saturated fats without justification on the label.
6. Taste and texture: objective criteria, not just preference
Gritty texture and an earthy taste are the most frequent problems in low-quality vegan proteins. They are not inevitable: they are the result of poor formulations or non-hydrolyzed proteins.
What to look for:
- Hydrolyzed pea protein: the hydrolysis process improves solubility and reduces the grainy texture
- Guar gum in low doses: improves creaminess without adding a strange flavor
- Natural flavorings (cocoa extract, natural vanilla) instead of artificial aromas
How to evaluate it before buying: look for verified reviews that speak specifically about texture and dissolution, not just flavor. A product that dissolves well in cold water with a simple spoon is a sign of formulation quality.
Conclusion: three questions before buying
Before adding any vegan supplement to your cart, ask yourself these three questions:
- From how many plant sources does the protein come? If it's only one, look for another option.
- Does it have functional ingredients with scientific backing? Nutriose®, DigeZyme®, or creatine monohydrate are signs of a formula with criteria.
- Does it have verifiable certifications? If it doesn't, the claims on the front label are just marketing.
Glorioso's vegan proteins
At Glorioso, we formulate every product by responding exactly to these criteria.
If you are looking for complete nutrition in a single shake: Fullfiber Protein combines 4 plant proteins with 8.1g of Nutriose® soluble fiber and DigeZyme® per serving. 15.2g of protein and approximately a third of the recommended daily fiber, with no added sugars.
If you are looking for sports performance: Creatine Protein provides 18.6g of plant protein from 4 sources plus 3g of creatine monohydrate per serving, with DigeZyme® for more comfortable absorption.
If you are looking for a complete protein shake with 20g of protein per serving: our range of flavored vegan proteins offers a high protein profile with the same base of 4 complementary plant sources, no added sugars, and vegan certification.
All our formulas are certified as 100% vegan, and are gluten-free and lactose-free.
Article prepared with nutritional criteria based on the recommendations of the EFSA (European Food Safety Authority). This content is for informational purposes and does not replace the advice of a health or nutrition professional.